Tip for Mothers who express.
Take an old or buy a cheap nursing bra. Put it on and mark with a pen where your nipples are. Cut a slit in each cup big enough for the pump shield to fit through.
Now when you have to pump, put the bra on (over your regular if you wish). Slip the shields in and on your breast. Attach the rest of the pump to the shield and your off. You can now have both hands free to do whatever you want.

I put this on in the morning and I'm able to get my hair done while pumping. You'll look funny and feel a bit like Madonna when you have the shields on without the rest of the pump but it's so worth it.
I also use it at work and I'm able to eat my lunch with both hands and pump.